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Finding the Third Proportional to 171.75 and 274.31

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Solution

The third proportional to 171.75 and 274.31 is: 438.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.75 : 274.31 = 274.31 : x
  2. Step 2: Convert to fraction form
    171.75/274.31 = 274.31/x
  3. Step 3: Cross multiply
    171.75x = 274.31 × 274.31
  4. Step 4: Simplify right side
    171.75x = 75,247.35
  5. Step 5: Solve for x
    x = 75,247.35/171.75
  6. Step 6: Final answer
    x = 438.12

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.